$384+ Cheap flights from Seattle (SEA) to Helsinki (HEL)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HEL
Sep 19 — Sep 261
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Helsinki with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Helsinki
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to HelsinkiExplore the most affordable flight options available from Seattle to Helsinki. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2026.
Explore the most affordable flight options available from Seattle to Helsinki. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2026.
This Scandinavian Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:55 pm -
1 stop32h 40m
Tue 10/611:15 am -
1 stop12h 30m
Deal found 8/15![Scandinavian Airlines logo]()
$482
This Ticket deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/33:55 pm -
1 stop23h 35m
Sat 10/109:05 pm -
1 stop26h 40m
Deal found 8/19![Scandinavian Airlines logo]()
$530
This Mytrip deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/33:55 pm -
2 stops21h 45m
Sat 10/107:15 pm -
2 stops28h 30m
Deal found 8/19![Multiple Airlines logo]()
$540
This Mytrip deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/22:35 pm -
2 stops21h 50m
Thu 12/107:20 am -
2 stops19h 40m
Deal found 8/19![Multiple Airlines logo]()
$551
This Flightnetwork deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:55 pm -
2 stops16h 50m
Fri 10/99:05 pm -
1 stop26h 40m
Deal found 8/17![Scandinavian Airlines logo]()
$571
This Mytrip deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:00 am -
3 stops27h 20m
Tue 9/226:50 pm -
3 stops33h 42m
Deal found 8/17![Multiple Airlines logo]()
$623
This oojo deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:55 pm -
2 stops13h 50m
Tue 9/297:15 am -
2 stops16h 30m
Deal found 8/18![Scandinavian Airlines logo]()
$630
This FlightHub deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:55 pm -
1 stop23h 35m
Mon 9/289:05 pm -
1 stop26h 40m
Deal found 8/17![Scandinavian Airlines logo]()
$633
This oojo deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:55 pm -
1 stop13h 25m
Sun 9/275:25 pm -
2 stops54h 20m
Deal found 8/17![Scandinavian Airlines logo]()
$634
Best flights from Seattle to HelsinkiDiscover carefully curated flight deals from Seattle to Helsinki that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
Discover carefully curated flight deals from Seattle to Helsinki that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
This Scandinavian Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:55 pm -
1 stop18h 30m
Tue 10/67:15 am -
2 stops16h 30m
Deal found 8/15![Scandinavian Airlines logo]()
$489
This Turkish Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:15 pm -
1 stop37h 30m
Tue 10/207:40 pm -
1 stop31h 40m
Deal found 8/17![Turkish Airlines logo]()
$883
This Scandinavian Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/113:55 pm -
1 stop32h 40m
Thu 10/159:05 pm -
2 stops32h 59m
Deal found 8/19![Scandinavian Airlines logo]()
$766
This Scandinavian Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/237:20 am -
2 stops22h 05m
Tue 1/2611:15 am -
2 stops20h 47m
Deal found 8/16![Scandinavian Airlines logo]()
$865
This Scandinavian Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/222:30 pm -
2 stops19h 50m
Tue 1/2611:15 am -
2 stops20h 47m
Deal found 8/16![Scandinavian Airlines logo]()
$865
This Scandinavian Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1011:00 am -
2 stops37h 35m
Wed 1/206:15 am -
2 stops26h 05m
Deal found 8/19![Scandinavian Airlines logo]()
$866
This Scandinavian Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/133:55 pm -
1 stop13h 25m
Sat 9/1911:15 am -
1 stop12h 30m
Deal found 8/16![Scandinavian Airlines logo]()
$867
This Scandinavian Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:24 am -
2 stops23h 01m
Tue 12/14:05 pm -
2 stops37h 59m
Deal found 8/19![Scandinavian Airlines logo]()
$869
This Scandinavian Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:20 am -
3 stops22h 35m
Tue 11/1711:15 am -
2 stops20h 49m
Deal found 8/15![Scandinavian Airlines logo]()
$888
This Scandinavian Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:24 am -
2 stops18h 11m
Wed 11/117:00 am -
3 stops23h 04m
Deal found 8/17![Scandinavian Airlines logo]()
$891
This Scandinavian Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:51 am -
2 stops18h 29m
Mon 11/27:00 am -
3 stops23h 04m
Deal found 8/17![Scandinavian Airlines logo]()
$911
Last-minute flights from Seattle to HelsinkiDiscover last-minute flight deals from Seattle to Helsinki. Data last updated August 20, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Helsinki. Data last updated August 20, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:00 am -
3 stops27h 20m
Tue 9/226:50 pm -
3 stops33h 42m
Deal found 8/17![Multiple Airlines logo]()
$623
This FlightHub deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:55 pm -
1 stop23h 35m
Mon 9/289:05 pm -
1 stop26h 40m
Deal found 8/17![Scandinavian Airlines logo]()
$633
This oojo deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:55 pm -
1 stop13h 25m
Sun 9/275:25 pm -
2 stops54h 20m
Deal found 8/17![Scandinavian Airlines logo]()
$634
This oojo deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:55 pm -
2 stops13h 50m
Tue 9/297:15 am -
2 stops16h 30m
Deal found 8/18![Scandinavian Airlines logo]()
$630
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:55 pm -
1 stop13h 25m
Mon 9/289:15 pm -
2 stops26h 30m
Deal found 8/17![Scandinavian Airlines logo]()
$651
This Scandinavian Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:55 pm -
1 stop32h 40m
Tue 10/611:15 am -
1 stop12h 30m
Deal found 8/15![Scandinavian Airlines logo]()
$482
One-way flights from Seattle to HelsinkiSearch for one-way flight options from Seattle to Helsinki. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
Search for one-way flight options from Seattle to Helsinki. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:24 pm -
2 stops32h 36m
Deal found 8/17![Multiple Airlines logo]()
$384
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/92:35 pm -
2 stops21h 50m
Deal found 8/17![Multiple Airlines logo]()
$385
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/283:40 pm -
3 stops44h 15m
Deal found 8/17![Multiple Airlines logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:00 pm -
2 stops35h 40m
Deal found 8/17![Multiple Airlines logo]()
$390
This Mytrip deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/132:35 pm -
1 stop12h 25m
Deal found 8/16![Icelandair logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:40 pm -
2 stops21h 05m
Deal found 8/18![Multiple Airlines logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:40 pm -
2 stops15h 00m
Deal found 8/17![Multiple Airlines logo]()
$412
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:00 pm -
3 stops30h 15m
Deal found 8/17![Multiple Airlines logo]()
$417
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/273:40 pm -
2 stops17h 00m
Deal found 8/17![Multiple Airlines logo]()
$424
This Mytrip deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:00 am -
3 stops28h 35m
Deal found 8/19![Multiple Airlines logo]()
$426
This Kiwi.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2610:40 am -
3 stops36h 50m
Deal found 8/19![Multiple Airlines logo]()
$427
Find flight deals from Seattle to Helsinki
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Helsinki (HEL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $482 (Scandinavian Airlines) |
One-way from | $384 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $946 |
Good one-way deal | $532 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Helsinki that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 20, 2026.
Use the filters below to find and compare flights from Seattle to Helsinki that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Tue 9/29
3:55 pm-8:25 pm
1 stop18h 30m
Helsinki-Vantaa
Tue 10/6
7:15 am-1:45 pm
2 stops16h 30m
$489
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Sun 10/11
3:55 pm-10:35 am
1 stop32h 40m
Helsinki-Vantaa
Thu 10/15
9:05 pm-8:04 pm
2 stops32h 59m
$766
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Sat 1/23
7:20 am-3:25 pm
2 stops22h 05m
Helsinki-Vantaa
Tue 1/26
11:15 am-10:02 pm
2 stops20h 47m
$865
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Fri 1/22
2:30 pm-8:20 pm
2 stops19h 50m
Helsinki-Vantaa
Tue 1/26
11:15 am-10:02 pm
2 stops20h 47m
$865
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Tue 11/10
11:00 am-10:35 am
2 stops37h 35m
Helsinki-Vantaa
Wed 1/20
6:15 am-10:20 pm
2 stops26h 05m
$866
Quickest round-trip
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Sun 9/13
3:55 pm-3:20 pm
1 stop13h 25m
Helsinki-Vantaa
Sat 9/19
11:15 am-1:45 pm
1 stop12h 30m
$867
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Tue 10/27
7:24 am-3:25 pm
2 stops23h 01m
Helsinki-Vantaa
Tue 12/1
4:05 pm-8:04 pm
2 stops37h 59m
$869
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Wed 10/7
7:15 pm-6:45 pm
1 stop37h 30m
Helsinki-Vantaa
Tue 10/20
7:40 pm-5:20 pm
1 stop31h 40m
$883
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Tue 11/10
7:20 am-3:55 pm
3 stops22h 35m
Helsinki-Vantaa
Tue 11/17
11:15 am-10:04 pm
2 stops20h 49m
$888
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Mon 10/26
7:24 am-10:35 am
2 stops18h 11m
Helsinki-Vantaa
Wed 11/11
7:00 am-8:04 pm
3 stops23h 04m
$891
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from Seattle to Helsinki
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Helsinki in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Seattle-Helsinki flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Helsinki flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Helsinki flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Helsinki flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Helsinki flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Seattle to Helsinki
Have a flexible travel schedule? Discover the best time to fly to Helsinki from Seattle with our price prediction graph.
SEA-HEL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Helsinki
How far ahead should I book a flight from Seattle to Helsinki?
The best time to book flights from Seattle to Helsinki is 13 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Seattle to Helsinki?
Currently, January is the cheapest month in which you can book a flight from Seattle to Helsinki (average of $543). Flying from Seattle to Helsinki in June is currently the most expensive (average of $1,178). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Seattle to Helsinki?
Airfare is below average for this route at the moment.
Seattle to Helsinki flights typically cost between $706 and $1,058 in September.The cheapest round-trip price found within the last 5 days was $482 on Scandinavian Airlines (Sep 29-Oct 6).
Reviews of airlines servicing Helsinki
Get insights into the airlines that provide service to Helsinki. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Helsinki. Reviews last updated August 20, 2026.
Get a feel of what it's like to fly with Delta,Finnair, andScandinavian Airlines from Seattle to Helsinki by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from Seattle to Helsinki. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Helsinki?
Book flights to Helsinki if you plan to visit one of these locationsVantaa
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Complete your trip
Complete your trip to Helsinki by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Helsinki by cabin class
Find flights from Seattle to Helsinki, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Helsinki
Explore flights to Helsinki departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 20, 2026.
Seattle and Helsinki flights
Browse other Seattle and Helsinki flight options. Last updated on August 20, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on August 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Seattle to Helsinki
Discover the top 4 airlines that operate flights from Seattle to Helsinki. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$353 | Average$585 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$514 | Average$889 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$526 | Average$1,020 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$790 | Average$1,183 | FlexibilityNo cancel fee | On-time76% |